WARREN, Ohio -- James Stringer, the father of late Minnesota Vikings lineman Korey Stringer, has died, his family said. He was 57.

James Stringer died of a heart attack Sunday at the Cleveland Clinic. He had been in the hospital since April because of illness, son Kevin Stringer said.

Korey Stringer, a Warren native who played college football at Ohio State, died from heatstroke during 2001 training camp with the Vikings.

The 27-year-old, 335-pound Pro Bowl lineman's death happened the morning after he practiced in the sweltering heat and humidity, which pushed his body temperature to 108.8 degrees.

James Stringer is survived by his wife, Cathy, daughter Kimberly and son Kevin. His funeral was scheduled for Monday at Agape Assembly Church in Warren.

During a visit at the hospital last week, James Stringer learned his son's wife had graduated from nursing school and that the Korey Stringer Community Fund was conducting its inaugural youth football camp.

"He was very excited about the things going on. He had the biggest smile on his face. That's the memory I'm going to try and cling to," Kevin Stringer told the Warren Tribune Chronicle.